Ground Zeroes is said to be the prologue while MGSV is the main portion with open-world elements.

I suspect it'll be like MGS2's Tanker/Big Shell, except with less "Hey, have a Raiden instead."/"La Lu Le Li Lol!"/Strapping plastic explosives onto Otocon's sister's butt (maybe), and more Pacifica Ocean bullshit, causing Time Paradoxes by shooting Revolver Ocelot, ridin' through the desert on the side of a horse with no name.

Going by past Metal Gears (or at least Rising) we won't get a release date for a while. My money's on E3 2014 before we get one, and it coming out next winter at best.

Well, I guess the development of MGO3 is gonna make the wait a little bit longer. The studio in Los Angeles is said that is gonna take charge of that portion of the game, I'm really curious to see how they handle the multiplayer this time.

I suspect it'll be like MGS2's Tanker/Big Shell, except with less "Hey, have a Raiden instead."/"La Lu Le Li Lol!"/Strapping plastic explosives onto Otocon's sister's butt (maybe), and more Pacifica Ocean bullshit, causing Time Paradoxes by shooting Revolver Ocelot, ridin' through the desert on the side of a horse with no name.